Girder and beam



(No Model.) 2 Sheets-Sheet 1.

P. H. JACKSON.

GIRD ER AND BEAM.

No. 279,249. Patented Jui le 12,1883.

(No Model.) 2 Sheets-Sheet 2.

P. H. JACKSON.

GIRDER AND BEAM.

N0. 279,249. Patented Julie '12, 1883.

,I have laid two or more side by side.

UNITED STATES PATENT OFFICE.

PETER H. JACKSON, OF SAN FRANCISCO, CALIFORNIA.

GIRDER'AND BEAM."

/ SPECIFICATION forming part of Letters Patent No. 279,249, dated June 12, 1883.

Application filed June 3,1882. (No model.)

To aZZ whom it may concern:

Be it known that 1, PETER H. J ACKSON, of the city and county of San Francisco, State of California, have invented an Improvement in Girders and Beams; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in supporting girders and beams, andin a means for uniting the ends of what are known as trimmer-beams, which may abut against the sides of those known as headerbeams or girders, when the latter are com posed of two or more beams, so as tokeep both at the same level, and form a strong and at the same time adjustable union between them.

It consists ofa shoe having tongues projecting so as to fit above and below-the header-beams,

and having a suitable socket in one side, into which the end of the trimmer-beam fits and is bolted. By making tongues on the top and bottom to fit all the beams composing the header, in case they do not fit, or by wedging them, so as to equalize the pressure, the weight of the trimmers is distributed on all the beams, as will be more fully explained by reference to the accompanying drawings, in which- Figure l is a perspective view. Fig. 2 is a transverse section. Fig. 3 is a view of the diaphragm. Fig. 4c shows manner of connecting the ends. Fig. 5 is a modification.

In many places, in the construction of build in gs, and particularly in thelaying of the beams to support. the sidewalks in basement-extensions, it is necessary to connect these beams, which are called trimmers, with the sides of other beams, called headers, running at right angles with them. These beams are of iron, usually of an I section, and they are ordinarily secured by straps of iron bolted to them. V In order to strengthen the headerbeams without increasing their size or depth, The trimmer-beams are then made to abut against the outside one, and if secured in the ordinary manner the whole weight and strain would fall upon the outer header-beam. In order to pro vide a convenient connection for the trimmer and header beams, and also a means for distributing and equalizing the weight, I construct a shoe, A, having an opening formed in one side to receive the end of the trimmer-beam B. The opposite side of the shoe is formed to fit the side of the header-beam C, and has tongues D E, which extend across the top and bottom of the header-beams C C, as shown. \Vhen two or more beams C are to be placed side by side, I fit a diaphragm, F, between them, having the shape of the space between the beams, where it fits perfectly, and is bolted in place. 7 At the junction where the ends of two beams abut these diaphragms extend a short distance into each one. Any weight or strain, therefore, which is brought upon one of the beams C will be transmitted to the other, and the two will act as one. As the weight of the trimmer-beams is all applied to one side of the outer header-beam, I transfer it to the inner ones and equalize the pressure upon all the beams by causing the tongues to press equally upon all the beams.

In some cases a single tongue extends across the tops of the beams C; but where there are a number of these beams I prefer to extend a tongue above and below, and they may be united at the inner ends by vertical bolts H, which makes the tongues act in concert. By this construction the trimmer-beams are easily united to the headers. The strength of the latter'may be multiplied indefinitely by placing a number side by side and bolting diaphragms F between them, and the weight of the trimmers may be distributed between them all by the tongues and bolts.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The parallel beams C C and the abutting beam B, in combination with the intervening shoe, A, having one side recessed to receive the end of the beam B, and having the tongue D projecting from and 611 top of the beams C,

beams O, and bolted together, substantially as O, to form withthe tongues both an internal and for the purpose herein described. and external support, herein described. 10 3. The parallel beams CC and the abutting In witness whereof I hereunto put my hand. beam B, with the intervening shoe, A, having PETER, H JACKSON 5 one side recessed to receive the end of the beam B, and the tongue or tongues D E, as shown, Witnesses: in combination with the interior diaphragm, O. D. COLE, F, fitting closely between the parallel beams O J. H. BLooD. 

